2016 SR5 experiencing a faint interference/vacuum leak/turbo spool sound under moderate acceleration. I found this post but wondered if anyone ever found a fix...
http://www.toyota-4runner.org/5th-gen-t4rs/127385-whistling-sound-under-moderate-load-anyone.html
http://www.toyota-4runner.org/5th-gen-t4rs/127385-whistling-sound-under-moderate-load-anyone.html